Was it simply random chance that such an odd schedule came about? I don't recall the Mammoth or any other NLL team having a similar one at any point.
If you look historically, you can find any number of oddities, really.
Minnesota this year, for example, will play 6 road games in a row over 5 weeks (they get a week off due to the ASG), including two weekends where they'll play Friday and Saturday night road games in different cities.
But in the end, we're trying to squeeze a 16 game schedule into maybe 18 weeks, and with a limited number of dates to work with. I'm often amazed that they're able to throw a schedule together at all.